Ill-feed mechanism



2 Sheets-Sheet 1.

A (No Model.)

' S. DICKSON.

SAW MILL FEED MECHANISM. 7

No. 294.208. Patented Feb. 26, 1884.

INVENTOR;

ATTORNEYS.

2 sheets sheet 2.

(No Model.) S

S. DIGKSON. SAW MILL FEED MEOHANISM.

Patented Feb.'.26, 1884.

INVENTOR -EESEI WITNESSES: q a; W

ATTORNEYS.

N PETERS. Phmmlilhourquhur. Wuhimllon. D. c.

' wheel.

UNITED Stars @rrrcn.

SILAS DICKSUN, or minor, OHIO, ASSIGNOR or ONETHIRD To SAMUEL nrnns, on sans PLACE.

SAW==MlLL-FEED MECt-iANiSM.

SPECIFICATION forming part of Letters Patent No. 294,208, dated February 26, 1884,

Application filed November 111, (X0 model.)

T0 at! whom it may concern;

Be it known that I, SILAS DICKSON, of Marcy, Fairfield county, Ohio, have invented a new and Improved Saw-MilLFeed Apparatus, of which the following is a full, clear, and exact description.

Thisinvention pertains to improvements in saw-mill-feed apparatus; audit consists of the combinations and arrangements of parts, substantially as hereinafter fully set forth and claimed. r Referenceis to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in'all the figures.

Figure 1 is a plan view of the feed-gear and log-carriage with my improvements. Fig. 2 is detail of the shifting device of the driving- Fig. 3 is a longitudinal section of the log-carriage and driving-chain and side elevation of the feed and reversing gear. Fig. 4 is a transverse section through part of the sawframe, a front elevation of the feed-gear, and end elevation of the carriage. Fig. 5 is a side and top view ofthe chain employed for work ing the carriage. r

The drivingwheel a, for working the feed and reversing shaft 6, which gears with the log-carriage c-by the sprocket-wheel d, has a bevel face, f, to drive "the friction-wheel g, placed below said driving-wheel on the shaft 11, and said driving-wheel a has a flat side, i, to drive against the cylindrical face of the wheel j, placed 011 shaft it above the axis of the driver a. The shaft of the driver has the bearing of its outer end fixed in a shifting boX, Z, connected withthe shifting-lever m, by which the driver a may be swung up into contact with wheel j, to feed the carriage c, and down into contact with wheel 9, to run the carriage back, said wheels [1 and j being turned in opposite directions, on account of being 10- cated on opposite sides of the driving-wheel .a. Any suitable device will be employed to fasten the lever m up when set to press the driving'wheel a against the feed-wheelj; but the said wheel a will generally be held in contact with driving-back wheel 9 by hand. The shaft h is suitably geared with the drivingshaft b by bevel-wheels 10. The power is to be applied to the drii' ing-wheel a by a belt, running on the pulley n. The feed-wheel j is fitted to the shaft 7b with a feather, allowing it to be shifted toward and from the axis of wheel a forvarying the rate of the feed; and a lever, o, is connected to the hub of the said wheel j, and suitably fitted on a fulcrum, p, for being operated by hand. Said lever 0 will be connected to the post qwith a pin or other suitable device, to hold the feed-wheel in the position to which it is set.

Instead of the usual toothed rack for driving the carriage I propose to employ the pitch-chain c with the sprocket-wheel (Z for driving it, the chain being connected at its ends with the respective ends of the carriage 0'; and to insure the chain from slipping off the teeth of the sprocket-wheel cl, I employ two idler sprocket-wheels, s s-one on each side of the driver Z-over which and down there from the chain must run in going around the driver, so that the chain cannot slip off. I propose to connect the ends of the chain to the ends of the carriage by extension-beams t, projecting sufficiently to enable the carriage to run each way beyond the saw, for carrying the ends of the log clear of the saw by the chain which gears with the driver (Z at about the vertical planeof the center of the saw; and at one end I connect the chain to the extension-beams t by a roller, 1), for taking up the slaclgof the chain from time to time. The chain is to have friction-rollers a: on the pivot 3 of the links 2', to facilitate the working of the chainjreely 011 the teeth of the sprocketwheels. The chain runs over rollers v at the ends of the carriage, to hold the chain up and prevent it from sagging too much thereat.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a saw-mill-feed apparatus, the combination, with the log-carriage, of a chain having a series of frictional rolls at the pivotal connection points of its links, and connected to end extensions of said carriage by slacktaking-up rolls, the driving sprocket-wheel, and additional sprocket-wheels arranged one in a plane on each side and slightly above the driving sprocket-wheel, substantially as and for the purpose set forth.

2. In a saw-niill-feed apparatus, the combination, with the log-carriage-operating chain and the chain-operating gearing, of the drivewheel adapted to be shifted from one to the other of two wheels arranged upon a common shaft, gearing with the shaft of the driving sprocket-wheel of the log-carriage, substantially as and for the purpose set forth.

8. In a saw-mill-feed apparatus, the combi nation, with the log-carriageoperating chain and the chain-operating gearing, of the drivewheel and additional wheels arranged upon a common shaft, gearing with the drivingsprocket-wheel shaft of the carriage, one of said latter wheels adapted to be shifted vertically, substantially as and for the purpose set forth.

4. In a saw-inill-feed apparatus, the combination, with the log-carriage-operating chain and the chain-operating gearing, of the drivewheel and additional wheels arranged upon a common shaft, gearing with the shaft of the driving sprocket-wheel of the log-carriage, one of said latter wheels adapted to be shifted vertically, and the drive-wheel arranged to be shifted from one to the other of the latter wheels, substantially as and for the purpose set forth.

In a sawmill-feed apparatus, the combination, with the log-carriage-operating chain and the chain-operating gearing, of the drive wheel adapted to be shifted from one to the other of two wheels arranged upon a common shaft, gearing with the shaft of the driving sprocket-wheel of the log-carriage, and the lever, with one end connected to an adjustable bearing of the drive-wheel shaft, and having its other end fulcrunied a suitable distance from said adjustable bearing, and provided with an operating arm or handle, substantially as and for the purpose set forth.

6. In a saw-niill-feed apparatus, the combination, with the log-carriage-operating chain and the chain-operating gearing, of the drivewheel, additional wheels arranged upon a common shaft, gearing with the drivingsprocket-wheel shaft of the log-carriage, one of said latter wheels adapted to be vertically adjustable, and the hand lever connected about centrally to the hub of said verticallyadjustable wheel, and suitably fulcrumed and retained in" position, substantially as and for the purpose set forth.

his I SILAS DICKSON.

mark.

\Vitnesses:

NOAH STEI'IELTON, \V. DICDIASTER. 

